<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Popup</title>
  <style>
    .hidden {
      display: none;
    }
  </style>
</head>

<body>
  <div class="popup-content">
    <button>male</button>
    <button>female</button>
  </div>
  <script src="popup.js"></script>
</body>

</html>